Welcome. I've never owned the pistol version so can't really answer those specific questions. Sean K. probably can. As for the muzzle device, that is entirely up to you. Parts can take a long time from order to delivery. So, yes, you should order as many spare parts as you wish to stockpile. Small parts kit, barrel, bolt, gas system, etc. Like the AK, XCR has quite a bit of reciprocating mass that contribute to its recoil behavior. Muzzle device can help. Weight from forward mounted accessories (light, DBAL, etc.) can help as well.